KR20170031845A - Apparatus for color tunable optical shutter using structual color filter - Google Patents

Apparatus for color tunable optical shutter using structual color filter Download PDF

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Publication number
KR20170031845A
KR20170031845A KR1020150129064A KR20150129064A KR20170031845A KR 20170031845 A KR20170031845 A KR 20170031845A KR 1020150129064 A KR1020150129064 A KR 1020150129064A KR 20150129064 A KR20150129064 A KR 20150129064A KR 20170031845 A KR20170031845 A KR 20170031845A
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KR
South Korea
Prior art keywords
color filter
color
optical shutter
liquid crystal
shutter device
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KR1020150129064A
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Korean (ko)
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KR101719253B1 (en
Inventor
장재은
김승욱
황재윤
문제일
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재단법인대구경북과학기술원
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Priority to KR1020150129064A priority Critical patent/KR101719253B1/en
Publication of KR20170031845A publication Critical patent/KR20170031845A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)

Abstract

The present invention relates to a shutter which expresses a variable color by using a liquid crystal and has an integrated structure with a polarizing plate and a structural color filter. According to the present invention, an apparatus for color tunable optical shutter using the structural color filter comprises: a liquid crystal which changes polarization characteristics according to an arrangement state; an electrode which varies the arrangement of the liquid crystal according to the application of voltage; and a structural color filter which is variably selected and expressed according to the polarization characteristic.

Description

TECHNICAL FIELD [0001] The present invention relates to a color variable optical shutter device using a color filter,

The present invention relates to a structure in which a polarizing plate and a structural color filter are integrated, and a shutter apparatus in which a variable color is expressed using a liquid crystal.

As mobile electronic devices such as mobile phones and tablets are developed, a demand for a flat panel display device having a color filter layer applicable thereto is steadily increasing.

In a liquid crystal display (LCD) according to the prior art, two polarizers and a color filter (CF) are required to display a color image due to its structural characteristics. Such a multi-layer structure has a flexible structure There is a problem that causes difficulty in applying.

Color filters using color pigments or dyes according to the related art are combined with optical shutters such as liquid crystals and can only be expressed in the case of a black color in which the color and light inherent in the color filter are blocked.

That is, the color filter layer has color filters of three colors of R, G, and B, and filters white light corresponding to pixels of the display device with light of a specific color. Because of these three colors, And color reproducibility are deteriorated.

The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a liquid crystal display device and a liquid crystal display device in which a polarization characteristic is induced by morphological or array asymmetry and a structure in which a structural color filter and a polarizer are integrated, There is an object to provide a color variable optical shutter device.

The color variable optical shutter device using the structured color filter according to the present invention is configured such that a liquid crystal for changing the polarization characteristic according to the arrangement state, an electrode for varying the arrangement of the liquid crystal according to voltage application, and a color variable depending on the polarization characteristic And a structural color filter to be expressed.

The color variable optical shutter device using the structured color filter according to the present invention has two or more colors implemented in a single cell structure to improve the resolution in the display and increase the color reproduction rate.

Further, according to the present invention, it is possible to reduce a layer with a structure in which a polarizing plate and a color filter are integrated, which is very advantageous for weight reduction and flexibility.

When two structure color filters are used, it is possible to realize a color variable optical shutter device with a lighter weight structure.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a conceptual view showing a color variable optical shutter apparatus using a structural color filter according to an embodiment of the present invention.
FIGS. 2 to 5 are side cross-sectional views illustrating the structure of a color variable optical shutter device using a structural color filter according to an exemplary embodiment of the present invention.
6 is a conceptual diagram illustrating a black color implementation of a color variable optical shutter device using a structural color filter according to an embodiment of the present invention.
7 is a view illustrating a structure of a color variable optical shutter device using a structural color filter according to an exemplary embodiment of the present invention and a black color implementation thereof.
FIG. 8 is a diagram illustrating a configuration of a color filter of a color variable optical shutter apparatus using a color filter according to an exemplary embodiment of the present invention. Referring to FIG.
FIG. 9 is a view showing another color experiment result of the color variable optical shutter device using the structural color filter according to the embodiment of the present invention in the same color filter. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, advantages and features of the present invention and methods of achieving them will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, And advantages of the present invention are defined by the description of the claims.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprises "and / or" comprising ", as used herein, unless the recited component, step, operation, and / Or added.

1 is a conceptual view showing a color variable optical shutter apparatus using a structural color filter according to an embodiment of the present invention.

The variable color optical shutter device using the structured color filter according to the exemplary embodiment of the present invention includes a liquid crystal 300 that changes the polarization characteristic according to the arrangement state and an electrode that varies the arrangement of the liquid crystal 300 according to the voltage application, And a structural color filter 200 in which a color is variably selected and expressed according to polarization characteristics.

According to the present invention, a structure for selectively transmitting or reflecting light is formed using a nano structure such as a nano hole.

Such a structure has morphological or array asymmetry as described above, and it is possible to derive polarization characteristics.

According to the embodiment of the present invention, it is possible to reduce the number of layers and to obtain an advantageous effect in weight reduction and flexibility. This is due to the structure in which the polarizing plate and the color filter are integrated and the variable color is realized by using the liquid crystal.

The light polarized in the polarizing plate structure is changed in accordance with the alignment state of the liquid crystal.

As shown in FIG. 1, the arrangement of the liquid crystals 300 is changed by the arrangement of the magnetic fields between the electrodes in the initial alignment state, thereby changing the path of the polarized light, Two or more colors may be implemented in the display unit 200.

2 is a view illustrating a color variable optical shutter apparatus using a structural color filter according to an exemplary embodiment of the present invention. Throughout the drawings attached hereto, the same hatching diagrams show the same color (red in the upper left direction, Green in the upper left direction, Black in the upper direction).

The structure color filter 200 shown in FIG. 2 also serves as a polarizing plate and an upper electrode, and it is possible for the liquid crystal 300 to be vertically arranged to change from a basic twisted shape when a voltage is applied.

Further, it is possible that the liquid crystal 300 is vertically arranged in a horizontal orientation, when the voltage is applied, or is arranged in a twisted array.

That is, the arrangement of the liquid crystal 300 before and after the voltage application is changed by the arrangement of the electric field according to the structure of the electrode 400 which is the alignment and transparent electrode, and the polarization characteristics of the light are changed as the refractive index is varied.

It is possible to implement two or more colors in one pixel by changing the arrangement of the liquid crystals 300 by applying a voltage and changing the polarizing characteristic of light.

3 is a view illustrating a color variable optical shutter apparatus using a structural color filter according to another embodiment of the present invention.

3, the structure color filter 200 functions as a color filter and a polarizer, and an electrode (second transparent electrode) 400b is formed on the same substrate to enable various driving.

3, the transparent electrode 400 is disposed as a first transparent electrode 400a and a second transparent electrode 400b. By vertically arranging the liquid crystal 300 by applying a voltage therebetween, Can be obtained.

FIG. 4 shows an embodiment using two structure color filters, wherein a first asymmetric structure color filter 200a and a second asymmetric structure color filter 200b are disposed.

The first asymmetric structure color filter 200a is disposed with the second transparent electrode 400b and the second asymmetrical structure color filter 200b is disposed with the first transparent electrode 400a without the polarizer .

FIG. 5 shows a case in which two color filter units 200a and 200b are used, and the color filter also serves as an electrode function of the upper and lower plates.

FIG. 6 is a conceptual view illustrating a black color implementation of a color variable optical shutter apparatus using a structural color filter according to an exemplary embodiment of the present invention. FIG. 7 is a view illustrating a color variable optical shutter apparatus using a structural color filter, And a black color implementation of the device.

As shown in FIG. 6 and FIG. 6, red, green, and black colors are implemented from the left side according to the arrangement direction of the liquid crystal 300, and the same hatching diagrams throughout the drawings attached to this specification It shows the same color.

Referring to FIG. 7, the color variable optical shutter device using the structural color filter according to the exemplary embodiment of the present invention includes an upper polarizer 100b and a lower polarizer 100a disposed on the upper and lower surfaces with respect to a space in which liquid crystals are arranged And the upper polarizer 100b and the lower polarizer 100a are arranged orthogonally to each other to realize a black color.

8 is a view showing an example of a structural color filter according to an embodiment of the present invention, wherein the structural color filter is an asymmetric structural color filter, and is formed of a metallic material and includes holes of predetermined shapes and sizes.

8 (a) to 8 (h) illustrate holes of various sizes and shapes, and the spacing P1 and P2 between the holes form holes according to predetermined ones.

FIG. 9 is a view showing another color experiment result of the color variable optical shutter device using the structural color filter according to the embodiment of the present invention in the same color filter. FIG.

As shown in FIG. 9A, the arrangement of the liquid crystals changes according to the application of a voltage, and a refractive index change is induced, and it is confirmed that two or more colors are realized.

Further, as shown in FIG. 9B, it is possible to realize two or more kinds of colors by inducing a polarization change of light by changing the arrangement according to the application of a voltage of the liquid crystal, and displaying a specific character using a color It is possible to confirm that it is possible.

The embodiments of the present invention have been described above. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

100: Polarizer 200: Structure color filter
300: liquid crystal 400: electrode

Claims (9)

A liquid crystal for changing a polarization characteristic according to an arrangement state;
An electrode for varying an arrangement of the liquid crystal according to a voltage application; And
A structural color filter in which a color is variably selected and expressed according to polarization characteristics
And a color variable optical shutter unit.
The method according to claim 1,
The liquid crystal has a configuration in which the arrangement of the liquid crystal before and after the voltage application is changed by arranging the electric field according to the structure of the electrode which is the alignment and transparent electrode and the polarization characteristic of the light is changed as the refractive index is changed
A variable color optical shutter device using a color filter.
3. The method of claim 2,
The liquid crystal is arranged such that its arrangement is changed vertically from the basic twisted shape upon voltage application
A variable color optical shutter device using a color filter.
3. The method of claim 2,
The liquid crystal may be arranged vertically from a horizontal orientation when a voltage is applied, or may be arranged in a twisted arrangement
A variable color optical shutter device using a color filter.
The method according to claim 1,
The structural color filter is formed of a metallic material and includes holes having predetermined shapes and sizes
A variable color optical shutter device using a color filter.
The method according to claim 1,
The structure color filter is disposed above the space in which the liquid crystal is arranged, and performs polarization and voltage application
A variable color optical shutter device using a color filter.
The method according to claim 1,
The structure color filter may be implemented with a transparent electrode on the same substrate
A variable color optical shutter device using a color filter.
The method according to claim 1,
Wherein the structural color filter is disposed at upper and lower portions with respect to a space in which the liquid crystal is arranged
A variable color optical shutter device using a color filter.
The method according to claim 1,
The upper and lower polarizers are arranged on the upper and lower surfaces with respect to the space in which the liquid crystals are arranged, and the upper and lower polarizers are arranged orthogonally to each other
A variable color optical shutter device using a color filter.
KR1020150129064A 2015-09-11 2015-09-11 Apparatus for color tunable optical shutter using structual color filter KR101719253B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200043636A (en) 2018-10-18 2020-04-28 재단법인대구경북과학기술원 Display device
KR20220020790A (en) 2020-08-12 2022-02-21 이화여자대학교 산학협력단 Multi-mode reflective color pixel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009294378A (en) * 2008-06-04 2009-12-17 Asahi Glass Co Ltd Polarizer and optical head device
KR20110070571A (en) * 2009-12-18 2011-06-24 엘지디스플레이 주식회사 Color filter using surface plasmon and liquid crystal display device, and method of fabricating the same
JP2011191688A (en) * 2010-03-16 2011-09-29 Toyota Central R&D Labs Inc Optical filter and display device
KR101420829B1 (en) * 2013-01-08 2014-07-21 한양대학교 산학협력단 Display Apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009294378A (en) * 2008-06-04 2009-12-17 Asahi Glass Co Ltd Polarizer and optical head device
KR20110070571A (en) * 2009-12-18 2011-06-24 엘지디스플레이 주식회사 Color filter using surface plasmon and liquid crystal display device, and method of fabricating the same
JP2011191688A (en) * 2010-03-16 2011-09-29 Toyota Central R&D Labs Inc Optical filter and display device
KR101420829B1 (en) * 2013-01-08 2014-07-21 한양대학교 산학협력단 Display Apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200043636A (en) 2018-10-18 2020-04-28 재단법인대구경북과학기술원 Display device
KR20220020790A (en) 2020-08-12 2022-02-21 이화여자대학교 산학협력단 Multi-mode reflective color pixel

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